Study On The Characteristics And Self-recovery Ability Of Moso Bamboo Forest By High Temperature And Drought

The carbon fixation of bamboo has a positive effect on the issue of climate warming.However,with the impact of greenhouse effect,extreme weather,in varying degrees on the growth of bamboo caused some damage.Especially in the extreme high temperature and drought are caused by the continuous high temperature and natural precipitation reduction,not only on the bamboo plant damage also on bamboo carbon stocks have a negative impact.In this study,the high temperature and drought disaster in 2013 was used as the climatic background to determine the affected plots' s loction and carry out follow-up investigation after disaster detailly.The direct harvests were used to obtain the biomass of Moso bamboo,the healthy samples were set up for contrastive analysis.At the same time,the affected index,recovery index of bamboo were structured according to the actual survey situation for the related analysis.The above data and methods were used to analyze the impact of high temperature and drought on bamboo and its self-recovery ability.(1)The disaster situation of bamboo were affected by the factors such as density of bamboo,soil thickness,soil moisture and slope.With the increase of soil density,soil thickness or soil moisture content,the proportion of slightly damaged bamboo is more and more than that of severely damaged bamboo.However,with increase of slope,the proportion of the slightly damaged bamboo more and more less the proportion of serious damage to bamboo bamboo.In addition,the proportion of the death rate of the first age of bamboo was higher than that of other bamboo age,and the proportion of dead bamboo was decreased with the increase of soil density,soil thickness or soil moisture content.With the increase in slope,the proportion of its death bamboo increased.The analusis about influence of the diameter of bamboo on the degree of disaster was found that the smaller the diameter of bamboo,the greater the proportion of death bamboo.(2)The analysis of the affected index of bamboo showed that the new bamboo's affected index is between 0.01 and 0.52;the second bamboo's affected index is between 0.02 and 0.14;the third bamboo's affected index is between 0 and 0.41;and each sample plot's affected index is between 0.06 and 0.34.The affected index of Moso bamboo was closely related to the affected index of the first age bamboo.There was a weak positive correlation between the affected index and slope,except for slope,there is almost no correlation between the affected index and the factor.There is a linear regression model between the affected index and the carbon storage reduction: y = 0.0009 x + 0.0.0554,R2=0.6879,the correlation is very significant.(3)The recovery ability analysis showed that the propotion of the number of affected plot account for 79% of the number of health plot about the firest age Moso bamboo in 2015.There is a significant positive correlation between the number of the first age Moso bamboo in 2015 and the number of the number of the first age Moso bamboo in 2013,and the linear regression model is y = 0.5051 x + 7.4765,R2=0.6342.Compared with the health Moso bamboo,the affected Moso bamboo's aboveground carbon storage(Moso bamboo forest productivity)recovered to 77%,so the Moso bamboo has the favourable self-recovery ability.(4)The analysis of the recovery index of bamboo showed that each sample plot's recovery index is between 0.41 and 1.11.Thereinto,only one sample plot's recovery index is over 1,and other sample plot's recovery indexes are less than 1 totally.There is no close relationship between the recovery index and the affected index of Moso bamboo in the affected plots;there is a weak negative correlation between the recovery index of bamboo plots and slope There was a significant positive correlation between the recovery index and the density of Bamboo.But,there was little correlation between the other factors and the affected index.